Scientific Papers of the Bureau of Standards, Vol. 16, 253-258 (1920) Scientific Paper 380 (S380)
QC 1 .U52 v.16 1920 c.2
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Scientific Papers of the Bureau of Standards is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder.